You can use InkWell to do that:
A rectangular area of a Material that responds to touch.
Below example demonstrate how to use InkWell. Notice: you don't need StatefulWidget to do that. I used it to change the state of the count.
Example:
import 'package:flutter/material.dart';
class SettingPage extends StatefulWidget {
@override
_SettingPageState createState() => new _SettingPageState();
}
class _SettingPageState extends State<SettingPage> {
int _count = 0;
@override
Widget build(BuildContext context) {
return new Scaffold(
body: new Center(
child: new InkWell(// this is the one you are looking for..........
onTap: () => setState(() => _count++),
child: new Container(
//width: 50.0,
//height: 50.0,
padding: const EdgeInsets.all(20.0),//I used some padding without fixed width and height
decoration: new BoxDecoration(
shape: BoxShape.circle,// You can use like this way or like the below line
//borderRadius: new BorderRadius.circular(30.0),
color: Colors.green,
),
child: new Text(_count.toString(), style: new TextStyle(color: Colors.white, fontSize: 50.0)),// You can add a Icon instead of text also, like below.
//child: new Icon(Icons.arrow_forward, size: 50.0, color: Colors.black38)),
),//............
),
),
);
}
}
If you want to get benefit of splashColor, highlightColor, wrap InkWell widget using a Material widget with material type circle. And then remove decoration in Container widget.
Outcome:
